Creating a cluster: Basic cluster settings

Use this page to enter the basic settings for a cluster.

To view this administrative console page, click Servers > Clusters > New.

Cluster name

Specifies the name of the cluster. The cluster name must be unique within the cell.

Short name

[z/OS]

Specifies the short name for this cluster. This field only appears if you are running on a z/OS platform.

The short name is used as the WLM APPLENV name for all servers that are part of this cluster.

If you specify a short name for a cluster member, the name:

If you do not specify a short name, the system assigns a default short name that is automatically unique within the cell. You can change the generated short name to conform with your naming conventions.

Prefer local

[AIX HP-UX Linux Solaris Windows]

Specifies that the host scoped routing optimization is enabled or disabled. The default is enabled, which means that, when possible, enterprise bean requests are routed to the client host. Enabling this setting improves performance because client requests are sent to local enterprise beans.

[z/OS] This field does not apply for z/OS.

Data type Boolean
Default true
Supported configurations: [may2010] If you enable the preferLocal optimization, the deployment manager must be running to affect the configuration. If the deployment manager is shut down, preferLocal optimization is not performed and requests might be dispersed across all the members of the cluster. [may2010]
may2010
sptcfg

Create replication domain for this cluster

Specifies that when the cluster is created, a memory-to-memory replication domain is created for this cluster. This replication domain has the same name as the cluster and has the default settings for a replication domain. The default settings for a replication domain are to create a single replica of each piece of data and to have encryption disabled. The Web container for each cluster member is also configured for memory-to-memory replication.

The default settings for the replication domain are good for an environment that has a middle to low traffic load. However, for an environment that has a high traffic load, you should change the replication domain configuration to a client-server replication because a client-server replication scales better. If you change the settings for one cluster member, you should change them for all cluster members.

To modify the replication domain properties, in the administrative console, click Environment > Replication domains > replication_domain_name.

To modify the properties for a Web container, in the administrative console, click Servers > Clusters >cluster_name > Cluster members > cluster_member_name > Session management > Distributed environment settings.

Existing server

Specifies whether to create an empty cluster or to add an existing application server to the cluster.

To create a cluster without an existing application server as a cluster member, click Do not include an existing server in this cluster.

To add an existing server to the cluster, click Select an existing server to add to this cluster and choose the application server to add to the cluster. This application server becomes a template for any additional cluster members that you add to the cluster. When adding servers to a cluster, the only way to remove an application server from a cluster is to delete the application server.

Weight

Specifies the amount of work that is directed to the application server.

If the weight value for the server is greater than the weight values that are assigned to other servers in the cluster, the server receives a larger share of the cluster workload. The value can range from 0 to 20. Enter zero to indicate that you do not want requests to route to this application server unless this server is the only server that is available to receive requests.

[z/OS] On the z/OS platform, weight is used to balance some of the workload types, but others are balanced by the z/OS system.



Related concepts
Clusters and workload management
Related tasks
Creating clusters
Related reference
Creating a cluster : Basic cluster member settings
Creating a cluster: Summary settings
Reference topic    

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Last updated: Sep 20, 2010 11:08:29 PM CDT
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